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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

</body>
<script>
    //声明一个对象
    //目标:遍历学生名字
    const banji = {
        name: '二年一班',
        stus: [
            '小明',
            '小军',
            '小红'
        ],
        [Symbol.iterator]() {
            //索引变量
            let index = 0;
            //
            let _this = this;
            return {
                next: function() {
                    if (index < _this.stus.length) {
                        const result = {
                            value: _this.stus[index],
                            done: false
                        };
                        // 下标自增
                        index++;
                        //返回结果
                        return result;
                    } else {
                        return {
                            value: undefined,
                            done: true
                        };
                    }

                }
            };
        }
    };

    // 遍历这个对象
    for (let v of banji) {
        console.log(v);
    };
    //小明
    //小军
    //小红
</script>

</html>